How many employees does High Voltage Substation Services Limited have?

High Voltage Substation Services Limited reported an average of 41 employees in the year to 31 Oct 2025.

Is High Voltage Substation Services Limited profitable?

Yes — High Voltage Substation Services Limited reported a profit of £186k in the year to 31 Oct 2025.

Company No. 06728632 · Incorporated 21 Oct 2008

High Voltage Substation Services Limited

Registered name: HIGH VOLTAGE SUBSTATION SERVICES LIMITED

High Voltage Substation Services Limited made £186k profit in the year to 31 Oct 2025 (revenue not disclosed).

High Voltage Substation Services Limited reported £186k profit in the year to 31 Oct 2025, up 146% on the year before; its revenue was not disclosed. It had 41 employees. The company is classified under “manufacture of electricity distribution and control apparatus” and is based in Watford; we hold 4 years of its filed accounts.

Profit onlySection C · ManufacturingSIC 27120Manufacture of electricity distribution and control apparatus SIC 27900Manufacture of other electrical equipment SIC 43999Other specialised construction activities n.e.c.

Status: Active
Location: Watford, East of England
Age: 17 yrs · since 2008
Type: Private Limited Company

Latest accounts · year to 31 Oct 2025

Key figures

Independent

Revenue

—

Not disclosed in filing

Profit

£186k

Growth ▲145.6%

Profit margin

—

Employees

Change ▼31.7%

Profit / employee

£4.5k

Profitable streak

3yrs

Consecutive profitable years in our data

This company published its profit but not its turnover, so revenue and margins are not disclosed. We never estimate them.

Badges are automated estimates derived from the filed figures — not statements of fact about the company.

4 filed years

Financial history

Multi-year financials, oldest to newest
Year to	31 Oct 2022	31 Oct 2023	31 Oct 2024	31 Oct 2025
Disclosure	No P&L	Profit only	Profit only	Profit only
Profit & loss
Revenue (turnover)	—	—	—	—
Gross profit	—	£4m	£4.4m	—
Operating profit	—	£485k	£172k	—
Profit before tax	—	£446k	£102k	—
Profit after tax	—	£395k	£75.8k	£186k
Profit (best available)	—	£395k	£75.8k	£186k
Employees (average)	28	47	60	41
Ratios
Profit margin	—	—	—	—
Profit per employee	—	£8.4k	£1.3k	£4.5k
Growth (year on year)
Profit growth	—	—	▼80.8%	▲145.6%
Headcount growth	—	▲67.9%	▲27.7%	▼31.7%
Balance sheet — indirect signals, not revenue
Cash at bank	£1m	£632k	£748k	£125k
Net assets	£1.5m	£1.6m	£1.5m	£1.2m
Fixed assets	£953k	£1.2m	£1.2m	£1.1m
Current assets	£2.3m	£2.5m	£4m	£4.3m
Debtors	£1.2m	£1.3m	£2.4m	£4.2m
Source	AbridgedAccounts · bulk data Jun 2024	AbridgedAccounts · bulk data Jun 2024	AbridgedAccounts · bulk data Jul 2025	AbridgedAccounts · bulk data Aug 2026

Derived from the latest filing

How the business works

Profit margin: —; Profit ÷ revenue.
Gross margin: —; Gross profit ÷ revenue. High for software and services.
Revenue per employee: —; Revenue ÷ average employees.
Profit per employee: £4.5k; Profit ÷ average employees.
Cash conversion: —; Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
Fixed assets ÷ revenue: —; Capital intensity. Low = capital-light, cheaper to start.
Deferred income ÷ revenue: —; Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
Debtors ÷ revenue: —; Money owed by customers. Low = customers pay quickly.

Indirect — not revenue

Balance-sheet signals

Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.

Net assets: ▼24%; Now £1.2m
Cash at bank: ▼83%; Now £125k
Headcount: ▼32%; Now 41
Deferred income: —; Now —
Fixed assets: ▼6%; Now £1.1m

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Sources

Companies House profile Filing history & original accounts

Latest figures from AbridgedAccounts for the year to 31 Oct 2025 (profit £186k), from the Companies House accounts bulk data published Aug 2026. Spotted an error? Request a correction.

Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.